科学研究表明，无论在何个年龄段戒烟，都能为健康带来显著益处。135岁前戒烟的人与从未吸烟者的寿命差距仅为1.2年，其中52.8%的35岁戒烟者将获得至少一年的额外寿命，36%的人甚至能多活8年或以上。1中年戒烟的效果更加明显，45岁戒烟者与未戒烟者相比平均多活5.6年，55岁戒烟者可多活3.4年。1在45至54岁戒烟的人群中，其全因死亡率比未戒烟者减少了约66%。1
即使在晚年戒烟也并非过晚。165岁戒烟者平均能多活1.7年，75岁戒烟者可获得0.7年的额外寿命，其中14.2%的晚年戒烟者能多活一年以上。1这些数据表明，戒烟的健康回报与开始时间有关，但任何年龄的戒烟决定都能为生命质量和寿命带来实际改善。
Quitting smoking can deliver substantial health improvements regardless of a person's age, according to scientific evidence presented in recent findings.1 Those who quit before age 35 experience only a 1.2-year difference in life expectancy compared to those who never smoked.1 Among smokers who quit at 35, 52.8% gain at least one additional year of life, while 36% live at least eight years longer.1
The health gains extend significantly into middle age and beyond. Individuals who quit at 45 live an average of 5.6 years longer than those who continue smoking,1 while those quitting at 55 gain 3.4 years.1 For people aged 45 to 54 who quit, their overall mortality rate drops by approximately 66% compared to continued smokers.1 Even late-life cessation yields measurable benefits: quitting at 65 adds an average of 1.7 years of life,1 at 75 it provides 0.7 additional years,1 and 14.2% of older adults who quit gain at least one more year.1
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